<template>
  <div>
    child
    {{a}}
  </div>
</template>

<script>
export default {
  props:['a'],
  async created(){
    console.log('child begin');
    console.log(this.a);    
    console.log('child end');
  },
  updated(){
    console.log('child update begin');
    console.log(this.a);
    console.log('child update end');
  }
}
</script>

<style>

</style>